1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db5d58ae3887aa9c39a9a599904c4492208863980647fbdd643b94831e3c0d5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4307713a-63b6-444b-a7e9-fa8ccc8dc260.json and https://artists.proofprofile.net/proofs/artist/4307713a-63b6-444b-a7e9-fa8ccc8dc260.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Tocata y Fuga in D Minor, BWV 565 (En la Tormenta Version)
Bach: Tocata y Fuga in D Minor, BWV 565 (Por el Mar Version)
Bach: Tocata y Fuga in D Minor, BWV 565 (En la Selva Version)
Bach: Tocata y Fuga in D Minor, BWV 565 (En el Viento Version)
Bach: Tocata y Fuga in D Minor, BWV 565 (A la Orilla de la Chimenea Version)
Bach: Tocata y Fuga in D Minor, BWV 565 (Con los Sonidos de la Naturaleza Version)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd28af2bfb210b155d20ecab1d06b85d03b71cdf87a905e94db533aaa43df27. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:31:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V82374267.